Improvement in spike-extractors



W. UPTON. Spike-Extractor.

Patented April 16, 1878.

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UNITED STATES PATENT. OFFICE.

WILLIAM UPTON, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR OF ONE- HALF HISRIGHT TO CHARLES R. KOI-IL, JOHN W. KOHL, AND WVILLIAM S. KOHL, OF SAMEPLACE.

lM PROVEM ENT IN SPI KE-EXTRACTO RS.

Specification forming part of Letters Patent No.

202,609, dated April 16, 1878; application filed March 7, 1878.

To all whom it may concern Be it known that I, WILLIAM UPTON, ofPhiladelphia, Pennsylvania, have invented a new and useful Improvementin Spike-EX- traetors, of which the following is a specification:

The object of my invention is to construct a simple and eifective devicefor withdrawing spikesan object which I attain in the following manner,reference being had to the accompanying drawing, in which- Figure 1 is aside view, partly in section, of my improved spikeextractor; Figs. 2, 3,4, and 5, views illustrating the method of withdrawing a spike; and Fig.6, a plan view of part of the implement.

A is a lever, of any suitable length, this lever having a notched lowerend, and innuediately adjacent to said lower end, and on the under side,a convex face, a. The lever is slotted for the reception of one end ofan arm, B, which is hung to a transverse pin, 1), and is hooked at theouter end, as shown.

To the opposite projecting ends of the pin 1) is-hung a yoke, D, whichembraces the stem of the lever A, and hangs down below the same.

In operating with the above-described device, the notched end of thelever A is adapted to the head of the spike on one side, the hooked endof the arm B catching under the head at the opposite side, as shown inFig. 2. The outer end of the lever is then depressed, the convex face aforming a constantly-shifting fulcrum, so that the spike is graduallywithdrawn until it is raised to the position shown in Fig. 3. The leverA is then elevated, as shown in Fig. 4, so that the yoke D may fall intoposition against a stop, 6, on the lever. The fulcrum of the lever isnow at the pin I), which is some distance above the surface of theobject into which the spike is end of the lever the entire withdrawal ofthe spike is effected, as shown in Fig. 5.

Although the pivoted arm B may be dispensed with in some cases, its useis to be preferred, as it enables a secure gripe to be taken upon thehead of the spike, and prevents the displacement of the lever A when theposition of the latter is being changed, as described.

Owing to the curved fulcrum-face a, the greatest power is exerted uponthe spike at the time when it is most needed-namely, at

tion.

I am aware that a spike-extracting lever has heretofore been combinedwith a pivoted yoke, and also that levers have been combined withpivoted arms for clutching the head of the spike, and these therefore,in themselves, I do not desire to claim; but

I claim as my invention- 1. The combination of the lever A, having ashoulder, 0, with the pivoted yoke D, adapted to the said shoulder, allsubstantially as set forth.

2. The combination of the lever A, the arm B pivoted thereto, and havinga hooked end, and the yoke D, pivoted to the lever, and adapted to swingdown below the same, as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WILLIAM UPTON.

WVitnesses HARRY A. CRAWFORD,

HARRY SMITH.

driven, so that on furtherdepressing the outerthe commencement of thewithdrawing opera

